Pump.



G. W. PAGE.

PUMP.

APPLIOATION FILED JUNE 2o, 1911.

1,020,051 Patented Mar. 12, 1912.

cnLUMmA I'LANommlll ch.. WAslllNG'ruN. u. C.

UNITED STATES PATENT OFFICE.

GEORGE W. PAGE, OF CAMPBELL, CALIFORNIA.

PUMP.

To all whom it may concern:

Be it known that I, GEORGE W. PAGE, citizen of the United States, residing at Campbell, in the county of Santa Clara and State of California, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to a pump, and particularly pertains to a pump cylinder for use in deep well pumping operations.

It is the object of this invention to provide a pump which possesses the qualities of cheapness, simplicity of construction, fewness of parts, and efficiency due to double action and a maximum of port area in proportion to discharge area.

Another object is to provide a pump for use inl deep wells, which may be easily removed from the pipe easing withoutdisturbing the discharge pipe when it is necessary to do so for the purpose of cleaning or for repairing.

The invention consists of' the parts and the construction and combination of parts, as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a vertical section of a pump constructed in accordance with my invention. Fig. 2 is a section on the line X-X Fig. l. Fig. 3 is a section on the line Y--Y Fig. 1.

In the drawings A represents a discharge pipe, which may be of' any desired dimensions, and is adapted to be lowered into a well casing B in the usual manner and as is common in deep well operations.

Mounted on the lower end of the discharge pipe A is an enlarging coupling 2, which coupling is connected at its lower end to a tapered casting, which casting is vformed with an outer shell 3 and an inner shell 4 spaced apart to form an annular space 5 therebetween. The inner shell 4 is connected to the outer shell 3 by means of webs 6, as shown in dotted lines in Fig. 2.

Threaded on the lower end of the shell 3 is a tubular casing 7, which extends some distance below the shell 3, and has a tapered tubular foot-piece 8 threaded on its lower end. The foot-piece 8 is formed with an upwardly projecting flange 9, which is disposed within the casing 7, and is spaced therefrom. The upper edge of the flange 9 is rabbeted at 10 to receive the lower end of a pump cylinder 11, which cylinder extends Specification of Letters Patent.

Application led .Tune 20, 1911.

Patented Mar. 12, 1912.

Serial No. 634,327.

upward within the casing 7, and is fitted at its upper end in a rabbet 12 formed on the lower edge of the shell 4. The pump cylinder 11 is of smaller diameter than the casing 7 so as to form an annular passage 13 between the pump cylinder 11 and the casing 7 the full length thereof'. The passage 13 communicates to the interior of the cylinder 11 through a series of' perforations 14, formed in the flange 9 at suitable distances apart and adjacent to the lower end of the cylinder 11. The interior of the cylinder 11 opens to the exterior of the casing 7 at a point approximately midway of its length, as shown at 15 in Figs. 1-3, by means of nipples disposed across the passage 13 at suitable distances apart, which nipples terminate in perfor-ations formed in the casing 7 and the pump cylinder 11.

The upper edges of the shells 3 and 4 are approximately on a level with each other and form a seat for a ring-valve 16, which valve is here shown as consisting of a fiat metallic ring with a suitable packing mounted on its under face. This ring 16 is designed to close the upper end of the passage 5 between the shells 3 and 4, which passage 5 is a continuation of the passage 13 between the casing 7 and the cylinder 11. The valve-ring 16 may be gravity seated or may be normally retained in a seated position by means of a helical spring 17, which bears between the upper face of the ring 16 and the outwardly projecting portion of the coupling 2. Sufficient space is provided hetween the upper face of the ring 16 and the inner face of the outwardly projecting portion of the coupling 2 to permit of sufficient upward movement of the ring 16 to allow fluids in the passage 13 to be discharged into the discharge pipe A, as will be later described.

The shell 4 is tapered on its inner face to receive a correspondingly tapered shell 18, the outside diameter of which shell is a trifle smaller than the inside diameter of the discharge pipe A; the shell 18 being designed to be set in place in the shell 4 in frictional engagement therewith after the discharge pipe A, with the connected parts previously mentioned are lowered in the well casing B. The shell 18 carries a vertically disposed, tubular member 20, which is arranged centrally of the shell 18, and is connected therewith by means of webs 21 shown in dotted lines in Fig. 2. The upper end of the tubular member 2O extendsk communication between the interior of the pump cylinder 11 and the discharge ,pipe A.

Extending through the tubular member 20 is a pump rod 23, which extends upward through the pipe A, and is connected to any suitable pump operating machinery, not necessary to be here shown; a stufing-box 24 being mounted on the upper end of the tubular member 20 surrounding the pump rod 23. A helical spring 25 bears between the outwardly projecting liange on the stuffing-box 24 and the disk 22 to normally retain the latter in a seated position. The lower portion of the pump rod 23 extends into the jump cylinder 11 approximately the full length thereof, and has a piston 26 mounted on its lower extremity, which pisyton is provided with upwardly and downwardly extending cup-leathers 27 and 27 on its upper and lower faces respectively.

Mounted on the pump rod 23 above the piston 26 is a tubular piston 28, which piston is rigidly mounted on the pump rod 23, and is arranged thereon in such position as to be disposed above the passages 15 when the piston 26 is in its lowermost position, as shown in Fig. 1. Seated on the piston 28 is a disk-valve 29, which is guided on the pump rod 23, and is normally retained in a seated position by means of a helical spring 30 which bears between the disk 29 and a collar on the shaft 23.

Mounted vwithin the tubular foot-piece 8 is a tapered shell 31, the upper edge of which forms a seat for a normally closed foot-valve 32 of the disk type, which may be either gravity seated or spring seated as desired. The shell 31 has a strap 33 formed on its upper edge, which strap carries a threaded stem '34. This stem is adapted to be screwed into an internally threaded projection formed on the underside of the piston 26 when it is desired to remove the foot-valveV 32 for cleaning or repairs.

In operation the casing 7 is lowered into the well B until it is submerged in the liquid to be pumped; the discharge pipe A extending from the upper end of the casing 7 to a suitable point exterior of the well casing B. The pump rod 13 is then reciprocated in any suitable manner so as to cause the pistons 26 and 28 to reciprocate in unison within the pump cylinder 11. Assuming the parts to be in the position shown in Fig. 1, with the interior of the pump cylinder 11 above the pistons 26 and 28, and the vpassage 13-to be completely filled with the liquid to be pumped, and the pistons moving upwardly with the pump rrod 23. Thev piston 28 in movingupward lifts the column of liquid thereabove in the chamber C and discharges it through the valve 22 into the discharge pipe A. At the same time the piston 26 in moving upward draws liquid into the lower end of the pump cylinder 11 through the foot-valve 32, filling the space D in the cylinder therebelow; the column of liquid in the passage 13 being prevented from entering the pump cylinder on the up-stroke of the piston 26 by reason of the seated valve 16 at the upper end of the passage 13; the piston 26 also carrying the column of liquid in the space E between the pistons 26-28 upward therewith. The up-stroke of the pistons being completed,-which stroke discharges a portion of the liquids previously pumped into the discharge pipe,-the pistons are then given a down-stroke. The piston 28 in moving downward creates a vacuum in the chamber C which causes the liquid in the cylinder 11 in the space E above the piston 26 and iowing therein through the ports 15, to pass through the valve 29 on the piston 28 and enter the space C above the piston 28, where it is trapped by the valve 29 in readiness to be discharged on the upstroke of the piston 28; liquid being supplied to the space E during this operation through the port-s 15. The piston 26 in moving downward forces the liquid therebeneath in the chamber D, which is trapped by the foot-valve 32, through the perforations 14 into the passage 13, and at the same time forces the liquid previously pumped into the passage 13, out through the valve-ring 16, into the discharge pipe A; the liquids in the discharge pipe A displaced by this charge flowing from the upper end thereof in the usual manner.

From the foregoing it will be seen that I have produced a pump having a single pump rod and a single discharge pipe, which is double acting and capable of large capacity in proportion to the sectional area of the pump casing. Thearea of the opening of the ring-valve 16 is approximately the same as that of the valve 22, so that the volume and velocity of the liquids discharged through these valves on the up .and down strokes will be substantially the same.

Vhen itis desired to remove the parts for cleaning 0r repairing, the foot-valve 32 is connected to the piston 26 by screwingV 23 is then withdrawn from the discharge pipe A, carrying the pistons26 and 28, the foot-valve 32, and the shell 18 withthe valve `2 therewith; the parts being restored to their respective positions by reversing the operation just described. M

While I lhave shown: t-he perforations 14 as formed in the foot-piece 8, and the valve 16 as disposed at the upper end of the passage 13, it is obvious that the perforations may be formed in the cylinder 11, and that the valve 16 may be disposed at any suitable point in the passage 13; the construction here shown, however, being preferable for reason of its convenience and accessibility.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is-

1. A pump comprising a pump cylinder, a pump rod, a pair of spaced pistons on said pump rod, disposed in said cylinder, and adapted to be reciprocated therein, a discharge pipe, a casing connected to the discharge pipe and comprising inner and outer shells, a disk valve supported on the inner shell of the casing and arranged to normally close the pipe cylinder to the pipe, and a passage formed exterior of said cylinder and leading from the lower end thereof, the space between the shells of said casing forming a continuation of said passage and connecting the passage with the interior of the discharge pipe.

2. A pump comprising in combination a pump cylinder, a casing surrounding said cylinder and spaced therefrom to form a passage exterior of the casing, open ports leading from the lower end of said cylinder to the passage between the cylinder and the easing, a discharge pipe with which the passage and the pump cylinder communicate, a pump rod disposed in said cylinder, a pair of spaced, superposed pistons ou said pump rod, a lift-valve in the uppermost of said pistons, a lift-valve between the pump cylinder and the discharge pipe, a lift-valve between the passage surrounding the pump cylinder and the discharge pipe, a footvalve at the lower end of said pump cylinder, and open ports leading from the exterior of the casing to the interior of the cylinder between the superposed pistons.

3. A pump comprising in combination, a pump cylinder, an inclosed passage surrounding said pump cylinder and communicat-ing with the interior of the cylinder near its lower end through open ports, a footvalve at the lower end of the pump cylinder, a lift-Valve at the upper end of the pump cylinder, a lift-valve at the upper end of the passage, a piston-rod, a solid piston on the lower end thereof, a valve piston on the rod above saidsolid piston, said pistons arranged to reciprocate in the cylinder, ports opening from the interior of the cylinder between the pistons to the exterior of the walls of the passage, and a discharge pipe with which the pump cylinder and the passage communicate through the beforementioned foot-valves.

4. A pump comprising in combination, a discharge pipe, a tapered, tubular shell on the lower end thereof, a second tapered, tubular shell disposed within and concentric to said first named shell and spaced therefrom, a ring lift-valve seated on theV upper edges of said shells to normally close the passage formed therebetween. a casin attached to the outermost of said shel s, a pump cylinder attached to the innermost of said shells and spaced concentrically wit-hin the casing, a tapered foot-piece on the lower end of said casing, engaging the lower end of the pump cylinder, a foot-valve mounted in said foot-piece, open ports leading from the interior of the pump cylinder near its lower end to the space between the cylinder and the casing, and ports leading from the pump cylinder intermediate its length to the exterior of the casing.

5. A pump comprising in combination, a discharge pipe, a tapered, tubular shell on the lower end thereof, a second tapered, tubular shell disposed within and concentric to said iirst named shell and spaced therefrom, a ring lift-valve seated on the upper edges of said shells to normally close the passage formed therebetween, a casing attached to the outermost of said shells, a pump cylinder attached to the innermost of said shells and spaced concentrically within the casing, a tapered foot-piece on the lower end of said casing, engaging the lower end of the pump cylinder, a foot-valve mounted in said foot-piece, open ports leading from the interior of the pump cylinder near its lower end to the space between the cylinder and the casing, and ports leading from the pump cylinder intermediate its length to the exterior of the casing, a removable lift-valve at the upper end of the pump cylinder opening to the discharge pipe, a pump rod extending through said valve and entering the pump cylinder, a pair of spaced superposed pistons mounted on said rod within the pump cylinder, the lowermost of which pistons is solid while the uppermost piston is tubular, and a lift-valve mounted on the tubular piston.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE W. PAGE.

Witnesses:

J oHN I-I. HERRING, CHARLES EDELMAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

